What could be better than jewelry featuring your own birthstone? The answer may be jewelry that also incorporates a loved one's birthstone. At least that's the case for Haley Bieber, who just debuted a new ring featuring her and her son's birthstones.

In an Instagram Story post on Saturday, Bieber revealed a ring inlaid with two gems that read “Jack” and “Mom.” The makeup mogul's caption was in honor of her son, Jack Bruce Bieber, whom she and Justin Bieber welcomed in August.

The Jack part of the huge new ring is a square-cut peridot, one of the traditional August birthstones. The “mama” stone, on the other hand, is a teardrop-cut topaz, an appropriate stone for Beaver's November 22 birthday.

This is not the first time the 28-year-old has worn jewelry in honor of her son; in September, Bieber showed off her diamond-encrusted “mom” ring on her Instagram Stories. (The ring, designed by Los Angeles-based jeweler Isa Glatman, retails for $1,980.)

The ring is also available in a variety of colors.

The couple has not released many photos of their newborn, but they are clearly overjoyed at the prospect of adding to their family; in August, an unnamed source told People that Justin was “already a great father” and that the couple was “praying” for a child. The source told the magazine, “The day Haley found out she was pregnant was Justin's best day ever.”

In October, Haley also told Glamour U.K. magazine that she was excited to start “rushing in the cold” again now that she has given birth. Even with the pressures of raising a newborn, the model also makes time for herself. And thanks to her creative jewelry, she never leaves baby Jack.